Selection: reimplement unselectable code to be cross-browser; refs #148
Selection: reimplement unselectable code to be cross-browser; refs #148

kfranqueiro/dgrid,dylans/dgrid,dylans/dgrid,kfranqueiro/dgrid,maier49/dgrid,kfranqueiro/dgrid,maier49/dgrid,dylans/dgrid,maier49/dgrid